摘要
为了深入研究超声振动辅助磨削碳化硅陶瓷的磨削表面质量规律,进行了无压烧结碳化硅陶瓷超声振动辅助磨削和普通磨削的对比实验,通过实验结果讨论了砂轮线速度、工件进给速度、磨削深度和超声振幅对磨削表面质量的影响.结果 表明,轴向超声振动辅助磨削的表面粗糙度随着砂轮线速度和超声振幅的增加而降低,随着工件进给速度和磨削深度的减小而降低.在砂轮线速度vs为1.88~15.07 m/s,工件进给速度fw为375~3 000 mm/min,磨削深度ap为5~35 μm,超声振幅A在0.5~4.6 μm范围内,轴向超声振动辅助磨削能够降低垂直于磨削方向的表面粗糙度2%~33%.在砂轮线速度vs=15.07 m/s,工件进给速度fw为1 000 mm/min,磨削深度ap为10 μm,超声振幅A为4.6μm时轴向超声振动辅助磨削能得到最低的表面粗糙度Ra为0.25 μm.砂轮线速度、工件进给速度较低时,轴向超声振动辅助磨削的效果更加明显.
In order to deeply study the law of grinding surface quality of ultrasonic vibration assisted grinding of silicon carbide ceramics,a comparative experiment was conducted between ultrasonic vibration assisted grinding and conventional grinding of non-pressurized sintered silicon carbide ceramics,and based on the experiments,the effects of grinding wheel linear speed,workpiece feed speed,grinding depth and ultrasonic amplitude on grinding surface quality were discussed.The results show that the surface roughness of the axial ultrasonic vibration assisted grinding decreases with the increase of grinding wheel linear speed and ultrasonic amplitude,and decreases with the decrease of workpiece feed speed and grinding depth.The axial ultrasonic vibration assisted grinding can reduce the surface roughness perpendicular to the grinding direction by 2%~33%in the range of 1.88~15.07 m/s,workpiece feeding speed fw=375~3000 mm/min,grinding depth ap=5~35μm,ultrasonic amplitude 0.5~4.6μm.When the grinding wheel linear velocity vs=15.07 m/s,workpiece feeding speed fw=1000 mm/min,grinding depth ap=10μm,ultrasonic amplitude A=4.6μm,the axial ultrasonic vibration assisted grinding can obtain the lowest surface roughness Ra=0.25μm.When the grinding wheel's linear speed and workpiece feed speed are low,the effect of axial ultrasonic vibration assisted grinding is more obvious.
作者
许陆昕
李华
蔡晓童
周培祥
陈艺文
XU Luxin;LI Hua;CAI Xiaotong;ZHOU Peixiang;CHEN Yiwen(School of Mechanical Engineering,SUST,Suzhou 215011,China;Suzhou Key Laboratory of Precision and Efficient Machining Technology,Suzhou 215011,China)
出处
《苏州科技大学学报（工程技术版）》
CAS
2020年第2期72-80,共9页
Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）
关键词
碳化硅陶瓷
超声振动
磨削
表面粗糙度
SiC ceramics
ultrasonic vibration
grinding
surface roughness
